MoO_2@N-doped C nanofibers（MoO_2@NC NFs）were synthesized by electrospinning with polyacrylonitrile as carbon source.The in situ formed MoO_2nanocrystals are completely embedded in the carbon nanofibers,which can not...MoO_2@N-doped C nanofibers（MoO_2@NC NFs）were synthesized by electrospinning with polyacrylonitrile as carbon source.The in situ formed MoO_2nanocrystals are completely embedded in the carbon nanofibers,which can not only accelerate ion transition,but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling.When used as the anode material for both Li/Na-ion batteries,the as-synthesized MoO_2@NC NFs displayed excellent Li~＋/Na~＋storage properties.As the anode for Li-ion battery,the MoO_2@NC NFs display a high discharge capacity of 930 mA h g^（-1）at a current density of 200 mA g^（-1）for 100 cycles,and 720 mA h g^（-1）at a current density of 1 A g^（-1）for 600 cycles.Moreover,the discharge capacity of 350 mA h g^（-1）could be realized at a current density of 100 mA g^（-1）for 200 cycles for Na-ion battery.展开更多
基金supported by the National Natural Science Foundation of China (51302079)
文摘MoO_2@N-doped C nanofibers（MoO_2@NC NFs）were synthesized by electrospinning with polyacrylonitrile as carbon source.The in situ formed MoO_2nanocrystals are completely embedded in the carbon nanofibers,which can not only accelerate ion transition,but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling.When used as the anode material for both Li/Na-ion batteries,the as-synthesized MoO_2@NC NFs displayed excellent Li~＋/Na~＋storage properties.As the anode for Li-ion battery,the MoO_2@NC NFs display a high discharge capacity of 930 mA h g^（-1）at a current density of 200 mA g^（-1）for 100 cycles,and 720 mA h g^（-1）at a current density of 1 A g^（-1）for 600 cycles.Moreover,the discharge capacity of 350 mA h g^（-1）could be realized at a current density of 100 mA g^（-1）for 200 cycles for Na-ion battery.
